
Rebuilding a mirrored RAID set
You can add a disk to a mirrored RAID set to increase the capacity of the set or replace a damaged disk. When you do, Disk Utility updates and rebuilds the RAID set.
When you add a disk to the RAID set, all of the files are erased. Be sure to make a copy of any important files on the disk before you add it to the set.
- Connect the new disk to your computer.
- In Disk Utility, select one of the RAID disks in the list of disks and volumes, then click RAID.
- Drag the new disk to the RAID list on the right.
- To remove a disk, select it.
- Click Update.